Phase transition and dynamic recrystallization mechanisms of white layer formation during turning superalloy Inconel 718

White layer is commonly formed on the machined surface of nickel-based Inconel 718 superalloy, which probably induces the generation of cracks, leading to the fatigue life reduction of the workpieces. Nevertheless, the microstructure of the white layer is still not revealed clearly. The core issues,...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Shibo Zhang, Zhanqiang Liu, Bing Wang, Xiaoping Ren, Aqib Mashood Khan, Ming Zhao
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Machining White layer Phase transition Dynamic recrystallization Inconel 718 Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/f57420298cb04aad87cf58eabb5b10d9
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:f57420298cb04aad87cf58eabb5b10d9
record_format	dspace
spelling	oai:doaj.org-article:f57420298cb04aad87cf58eabb5b10d92021-11-16T04:10:43ZPhase transition and dynamic recrystallization mechanisms of white layer formation during turning superalloy Inconel 7182238-785410.1016/j.jmrt.2021.11.004https://doaj.org/article/f57420298cb04aad87cf58eabb5b10d92021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2238785421012837https://doaj.org/toc/2238-7854White layer is commonly formed on the machined surface of nickel-based Inconel 718 superalloy, which probably induces the generation of cracks, leading to the fatigue life reduction of the workpieces. Nevertheless, the microstructure of the white layer is still not revealed clearly. The core issues, which this paper aims to reveal, are the transition of γ, γ′, γ'' and δ phases and dynamic recrystallization mechanism within the white layer formed during turning Inconel 718. Therefore, the dry orthogonal cutting tests with worn tools were conducted to make the white layer first. After that, the morphology and microstructure of the white layer are studied with the aid of scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X-ray diffraction (XRD), and electron backscatter diffraction (EBSD). The results indicate that the thickness of the white layer is uneven and varies within three microns. Meanwhile, the amount of γ′ phase decreases, and δ phase is crushed and refined within the white layer. The lattice mismatch between γ and γ'' phases decreases and the white layer is more homogeneous than the original material. Furthermore, the grains were refined to submicron, and continuous dynamic recrystallization (CDRX) occurs in the white layer. The CDRX results in a recrystallized structure with significantly reduced defect density in the white layer formed during the turning of Inconel 718.Shibo ZhangZhanqiang LiuBing WangXiaoping RenAqib Mashood KhanMing ZhaoElsevierarticleMachiningWhite layerPhase transitionDynamic recrystallizationInconel 718Mining engineering. MetallurgyTN1-997ENJournal of Materials Research and Technology, Vol 15, Iss , Pp 5288-5296 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Machining White layer Phase transition Dynamic recrystallization Inconel 718 Mining engineering. Metallurgy TN1-997
spellingShingle	Machining White layer Phase transition Dynamic recrystallization Inconel 718 Mining engineering. Metallurgy TN1-997 Shibo Zhang Zhanqiang Liu Bing Wang Xiaoping Ren Aqib Mashood Khan Ming Zhao Phase transition and dynamic recrystallization mechanisms of white layer formation during turning superalloy Inconel 718
description	White layer is commonly formed on the machined surface of nickel-based Inconel 718 superalloy, which probably induces the generation of cracks, leading to the fatigue life reduction of the workpieces. Nevertheless, the microstructure of the white layer is still not revealed clearly. The core issues, which this paper aims to reveal, are the transition of γ, γ′, γ'' and δ phases and dynamic recrystallization mechanism within the white layer formed during turning Inconel 718. Therefore, the dry orthogonal cutting tests with worn tools were conducted to make the white layer first. After that, the morphology and microstructure of the white layer are studied with the aid of scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X-ray diffraction (XRD), and electron backscatter diffraction (EBSD). The results indicate that the thickness of the white layer is uneven and varies within three microns. Meanwhile, the amount of γ′ phase decreases, and δ phase is crushed and refined within the white layer. The lattice mismatch between γ and γ'' phases decreases and the white layer is more homogeneous than the original material. Furthermore, the grains were refined to submicron, and continuous dynamic recrystallization (CDRX) occurs in the white layer. The CDRX results in a recrystallized structure with significantly reduced defect density in the white layer formed during the turning of Inconel 718.
format	article
author	Shibo Zhang Zhanqiang Liu Bing Wang Xiaoping Ren Aqib Mashood Khan Ming Zhao
author_facet	Shibo Zhang Zhanqiang Liu Bing Wang Xiaoping Ren Aqib Mashood Khan Ming Zhao
author_sort	Shibo Zhang
title	Phase transition and dynamic recrystallization mechanisms of white layer formation during turning superalloy Inconel 718
title_short	Phase transition and dynamic recrystallization mechanisms of white layer formation during turning superalloy Inconel 718
title_full	Phase transition and dynamic recrystallization mechanisms of white layer formation during turning superalloy Inconel 718
title_fullStr	Phase transition and dynamic recrystallization mechanisms of white layer formation during turning superalloy Inconel 718
title_full_unstemmed	Phase transition and dynamic recrystallization mechanisms of white layer formation during turning superalloy Inconel 718
title_sort	phase transition and dynamic recrystallization mechanisms of white layer formation during turning superalloy inconel 718
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/f57420298cb04aad87cf58eabb5b10d9
work_keys_str_mv	AT shibozhang phasetransitionanddynamicrecrystallizationmechanismsofwhitelayerformationduringturningsuperalloyinconel718 AT zhanqiangliu phasetransitionanddynamicrecrystallizationmechanismsofwhitelayerformationduringturningsuperalloyinconel718 AT bingwang phasetransitionanddynamicrecrystallizationmechanismsofwhitelayerformationduringturningsuperalloyinconel718 AT xiaopingren phasetransitionanddynamicrecrystallizationmechanismsofwhitelayerformationduringturningsuperalloyinconel718 AT aqibmashoodkhan phasetransitionanddynamicrecrystallizationmechanismsofwhitelayerformationduringturningsuperalloyinconel718 AT mingzhao phasetransitionanddynamicrecrystallizationmechanismsofwhitelayerformationduringturningsuperalloyinconel718
_version_	1718426762571939840

Phase transition and dynamic recrystallization mechanisms of white layer formation during turning superalloy Inconel 718

Ejemplares similares